James Cameron called it "the best space film ever done." Groundbreaking, piss-your-pants space spectacle Gravity stars Sandra Bullock and George Clooney as two astronauts who struggle to survive in zero-G space after their shuttle is destroyed by debris. It's a vertiginous imagining of what it would feel like to almost die above the Earth, tumbling helmet-over-boots and running out of oxygen, as tiny bits of speeding shrapnel threaten to perforate your face.Sandra Bullock: Shooting Gravity Was 'Frustrating, Painful'

The movie is the brainchild of Alfonso Cuarón, director of Y Tu Mamá También and Children of Men. "I've always been a very low-tech kind of guy," says Cuarón, catching his breath on a couch in a Toronto hotel, visibly exhausted by rounds of schmoozing at the Toronto International Film Festival. "I got my first computer, like, five years ago."